In a plant, fruit color is either red or yellow, and fruit shape iseither oval or long. Red and oval are the dominant traits. Twoplants, both heterozygous for these traits, were testcrossed, withthe results shown in the following table. Determine the locationof the genes relative to one another and the genotypes of the twoparental plants. ProgenyPhenotype Plant A Plant Bred, long 46 4yellow, oval 44 6 red, oval 5 43yellow, long 5 47Total 100 100

In a plant, fruit color is either red or yellow, and fruit shape iseither oval or long. Red and oval are the dominant traits. Twoplants, both heterozygous for these traits, were testcrossed, withthe results shown in the following table. Determine the locationof the genes relative to one another and the genotypes of the twoparental plants. ProgenyPhenotype Plant A Plant Bred, long 46 4yellow, oval 44 6 red, oval 5 43yellow, long 5 47Total 100 100

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter13: Patterns In Inherited Traits

Section: Chapter Questions

Problem 6GP: In sweet pea plant, an allele for purple flowers (P) is dominant when paired with a recessive allele...

See similar textbooks

Similar questions

A pure-breeding strain of squash that produced diskshaped fruits (see the accompanying illustration) wascrossed with a pure-breeding strain having long fruits.The F1 had disk fruits, but the F2 showed a new phenotype, sphere, and was composed of the followingproportions:Longlong 32 sphere 178 disk 270Sphere DiskPropose an explanation for these results, and showthe genotypes of the P, F1, and F2 generations.
A strain of plants has a mean height of 24 cm. A second strain ofthe same species from a different geographical region also has a mean height of 24 cm. When plants from the two strains arecrossed together, the F1 plants are the same height as the parentplants. However, the F2 generation shows a wide range ofheights; the majority are like the P1 and F1 plants, but approximately4 of 1000 are only 12 cm high, and about 4 of 1000 are36 cm high. Question: What mode of inheritance is occurring here?
The R and S loci are 35 m.u. apart. If a plant of genotyper sR Sis selfed, what progeny phenotypes will be seen and inwhat proportions?
Two plants, both heterozygous for these traits, were testcrossed,with the following results.ProgenyPhenotype Plant A Plant Bred, long 46 4yellow, oval 44 6red, oval 5 43yellow, long 5 47100 100Determine the location of the genes relative to one anotherand the genotypes of the two parental plants.
A researcher crosses two white-flowered lines ofAntirrhinum plants as follows and obtains the followingresults:pure line 1 × pure line 2↓F1 all whiteF1 × F1↓F2 131 white29 reda. Deduce the inheritance of these phenotypes; useclearly defined gene symbols. Give the genotypes ofthe parents, F1, and F2.b. Predict the outcome of crosses of the F1 with eachparental line.
Normally, wild violets have yellow petals with darkbrown markings and erect stems. Imagine you discover a plant with white petals, no markings, andprostrate stems. What experiment could you performto determine whether the non-wild-type phenotypesare due to several different mutant genes or to thepleiotropic effects of alleles at a single locus? Explainhow your experiment would settle the question.
Seed weight in a particular plant species is determined by pairs of alleles attwo loci (a+ a− and b+ b−) that are additive and equal in their effects. Plantswith genotype a− a− b− b− have seeds that average 1 g in weight, whereasplants with genotype a+ a+ b+ b+ have seeds that average 3.4 g in weight. Aplant with genotype a− a− b− b− is crossed with a plant of genotype a+ a+ b+b+.a. What is the predicted weight of seeds from the F1 progeny of this cross?b. If the F1 plants are intercrossed, what are the expected seed weights andproportions of the F2 plants?
In corn, a triple heterozygote was obtained carrying themutant alleles s (shrunken), w (white aleurone), andy (waxy endosperm), all paired with their normal wildtype alleles. This triple heterozygote was testcrossed, andthe progeny contained 116 shrunken, white; 4 fully wildtype; 2538 shrunken; 601 shrunken, waxy; 626 white;2708 white, waxy; 2 shrunken, white, waxy; and 113 waxy.a. Determine if any of these three loci are linked and,if so, show map distances.b. Show the allele arrangement on the chromosomesof the triple heterozygote used in the testcross.c. Calculate interference, if appropriate.
. A snapdragon plant that bred true for white petals wascrossed with a plant that bred true for purple petals, andall the F1 had white petals. The F1 was selfed. Among theF2, three phenotypes were observed in the followingnumbers:white 240solid purple 61spotted purple 19Total 320a. Propose an explanation for these results, showinggenotypes of all generations (make up and explain yoursymbols).b. A white F2 plant was crossed with a solid purple F2plant, and the progeny werewhite 50%solid purple 25%spotted purple 25%What were the genotypes of the F2 plants crossed?
In Drosophila, the autosomal recessive dp allele ofthe dumpy gene produces short, curved wings, whilethe autosomal recessive allele bw of the brown genecauses brown eyes. In a testcross using femalesheterozygous for both of these genes, the followingresults were obtained:wild-type wings, wild-type eyes 178wild-type wings, brown eyes 185dumpy wings, wild-type eyes 172dumpy wings, brown eyes 181In a testcross using males heterozygous for both ofthese genes, a different set of results was obtained:wild-type wings, wild-type eyes 247dumpy wings, brown eyes 242a. What can you conclude from the first testcross?b. What can you conclude from the second testcross?c. How can you reconcile the data shown in parts (a)and (b)? Can you exploit the difference betweenthese two sets of data to devise a general test forsynteny in Drosophila?d. The genetic distance between dumpy and brown is91.5 m.u. How could this value be measured?
A cross between two pea plants, both of which grewfrom yellow round seeds, gave the following numbersof seeds: 156 yellow round and 54 yellow wrinkled.What are the genotypes of the parent plants? (Yellowand round are dominant traits.)
In a certain plant, fruit is either red or yellow, and fruit shape is either oval or long. Red and oval are the dominant traits. Two plants, both heterozygous for these traits, were testcrossed, with the following results. Progeny Phenotype Plant A Plant B red, long 46 4 yellow, oval 44 6 red, oval 5 43 yellow, long 5 47 100 100 Determine the location of the genes relative to one another and the genotypes of the two parental plants.